Automatic gas cut-off.



A. M. c. BUBB.

AUTOMATIC GAS GUT-OFF. 1 APPLIOATION FILED NOV. 9, 1911.

1,022,822. Patented Apr. 9, 1912.

' COLUMBIA PLANOGRAPH co., WASHINGTON, n. c.

ABRAM M. BUBB, OF WOOIDBRIDGE, VIRGINIA.

AUTOMATIC GAS cur-our.

Specification of Letters Patent. Application filed November 9, 1911.

Patented Apr. 9, 1912. Serial No. 659,359. I

To all whom it may concern:

Be it known that I, ABRAM M. G. BUBB, a citizen of the United States, residing at Woodbridge, in the county of Prince William and State of Virginia, have invented a new and useful Automatic Gas Cut-01f; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a new and useful automatic gas cut-off.

The principal object of the invention is the provision of a novel, simple, durable, and inexpensive and practical device of this nature, adapted to be manually operated to allow the gas to be admitted to the burner, but in the event the gas be blown oult or goes out, the valve'is closed automatica ly.

The invention comprises further features and combination of parts, as hereinafter set forth, shown in the drawings and claimed.

In the drawings :Figure 1 is a view in side elevation, showing the cut-off as applied to the burner tube. Fig. 2 is a simi-' lar view partly in section showing the gas lighted, and a member arranged in position, adapted for automatically Fig. 3 is a detail perspective view of the member (which is slidably mounted in a guide and pivoted to an oscillating member) for closing the valve automatically. {fig 4 is a sectional view on line 4.-4 of .i 2. l teferring more especially to the drawings 1 designates the burner tube having the usual valve cock 2, movable with which valve is a lug 3. Carried by the burner tube is an angular bracket 4 having aguide opening 5 in its lower part and a similar 0 ning 6 in its upper part. burner tube is a triangular shaped bracket 7, in the arms of which a pivot pin 8 is mounted. Pivoted on the pin 8, is an oscillating bar 9, the lower end of which is turned into a roll 10. A bar 11 is provided,

one end of which is slidably mounted in the opening 5, while the other end is provided.

with the rolls 12.

cooperate with the pawl 13, the end 14 rolls 15. The rolls ranged in registration, so as to receive a pivot pin .16, thus hingedly connecting the Adapted to engage and lug 3 of thevalve is a lar bracket 4. The

closing the valve.

Also secured to the of which is turned into 10, 12 and 15 are aroscillating member 9, the bar 11 and the pawl 13, at one point. The upper end of the oscillating member 9 is pivotally connected to the sliding bar 17, which is slidably mounted in the opening 6 of the anguend 18 of the bar 17 is disposed. adjacent one of the diaphragm disks 19 of the expanding or contracting device 20 which is disposed in close position to the gas flame. Threaded on the bar 11 is a nut 21 and disposed between the nut and the bracket 4 is a spring 22, the action of which is designed to move the bar 11 in the direction of the arrow 23 in Fig. 2, when the gas flame goes out, or is blown out.

To light the gas the pawl 13 is raised, by means of the arm 24 thereon, thus allowing the valve of the valve cock to be moved to an open position, so as to admit the gas to the burner. The purpose of raising pawl 13, is to permit the lug 3 of the valve to pass the free end of the pawl. When the gas is admitted to the burner the 'same may be lighted in the usual manner. When lighted, the heat therefrom causes the diaphragm disks to expand, and by their expansion', the bar 17-is moved in the direction of the arrow 25, thus oscillating the member 9. The lower end ofthe member being connected hingedly to the pawl 13 and bar 11, causes the pawl and bar 11 to be moved in the direction of the arrow 26, thus setting the free end of the pawl in front of the lug 3 on the valve, as in Fig. 2. As long as the flame remains burning, the bars 11 and 17 and the pawl 1.3 will remain in these po. sitions. WVhen the flame goes out or is blown out, the steady heat is necessarily eliminated, and when the diaphragm disks become cold, they contract. As the disks contact the spring 22 moves the bar 11 in the direction of the arrow, which in turn moves the pawl 13, thus closing the valve member, because the free end of the pawl is in front of the lug 3.

The invention having been set forth, what is claimed as new and useful is:

1. In combination, a burner tube having' avalve cock including a valve member, the valve member having a lug, a pair of brackets mounted on the burner tube, an oscillatory member pivoted in one of the brackets,

a bar having one end slidably mounted in i the other bracket, a pawl adapted to engage the lug to move the valve member, meansfor hingedly connecting one end of the pawl and the bar to the lower end of the oscillating member, a bar pivoted to the upper end of the oscillating member and slidably mounted in the upper end of one of the brackets, means adapted to be expanded by the heat of the flame from moving the second bar so as to set the pawl in engagement with the lug, and means for moving the first bar and the pawl for closing the valve mem-, her when the first means become cold after the flame is extinguished.

2. In combination, a burner tube having a valve cock including a valve member, the valve member having a lug, a pair of lorack ets mounted on the burner tube, an oscillatory member pivoted in one of the brackets, a bar having one end slidably mounted in the other bracket, a pawl adapted to engage the lug to move the valve member, means for hingedly connecting one end of the pawl and the bar to the lower end of the oscillatory member, a bar pivoted to the upper end of the oscillating member and slidably mounted in the upper end of one of the brackets, means adapted to be expanded by the heat of the flame from moving the secl ond bar so as to set the pawl in engagement with the lug, and a spring for moving the first bar and the pawl for closing the valve member as the first means become cold after the flame is extinguished.

3. In an automatic gas cut-off, a burner tube having a valve cock including a valve member provided with a lug, an oscillatory member, a sliding bar and a pawl hingedly connected to the lower end of the oscillatory member, means for actuating the oscillatory member for setting the pawl in engagement with the lug when the valve member is in open position, the means adapted to be actuated from the heat of the flame, and a spring placed under tension when the pawl is set in engagement with the lug, the spring adapted to move the bar and the pawl, which in turn closes the valve member.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ABBA M. C. BUBB.

Witnesses:

ROBERT A. BOSWELL, DEAN SWIFT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, .D. G. 

